Thanks a million @MariaAM! I took the liberty to move your post to a separate topic, because this knowledge is too valuable to get snowed under in the day-to-day Team Building exchanges.
To answer your question: I am not 100% sure, but my intuition is that the other cohousings just went in without too much analysis. In Brutopia for example we know that they skipped a couple of communes like Watermael-Boitsfort because they are too expensive and full anyway, but other than that they just cut up the map of Brussels and went out. That being said I think it would be a good idea to reach out to your colleagues from the “GT Architecture” from Brutopia, l’Echappée, Ilot De Spiegel and Tivoli, because they may have a lot of good advise that will spare us a lot of misery. A good starting point is the manual that was written by l’Echappée.